Just in case you haven't heard, thousands and thousands of people don a jaunty red stocking cap and many add Santa's entire red suit, reindeer antlers, and mistletoe scarves for one day of pre-Christmas revelry called SantaCon.

This year's event is scheduled for Saturday.

Expect streets and bars to be crowded with Santa wannabes, some of whom don't behave in the jolly, benevolent manner exemplified by St. Nick.

To curb such naughty behavior, the Metropolitan Transportation Authority has banned alcohol on all Metro-North Railroad and Long Island Rail Road trains and in stations from noon on Saturday through noon on Sunday.

A crowd of people dressed as Santa gather for a group photo during the annual SantaCon pub crawl in Brooklyn. It takes place Dec. 9, 2017.(Photo11: Stephanie Keith, Getty Images)

MTA police officers will be on duty at Grand Central Terminal, Penn Station, and stations throughout the region, as well as on trains to enforce the ban and confiscate alcoholic beverages. Violators may also be subject to removal from the train or station by police, according to the MTA press release.

The exact areas where SantaCon takes place are announced the night before each celebration. The annual event is held at cities across the U.S. and internationally. Find more info at santacon.info

For more information about Metro-North's ban, rules and regulations, go to web.mta.info